Error message

• Warning: file_get_contents(https://www.units.it/grafica-coordinata.json): failed to open stream: HTTP request failed! HTTP/1.0 500 Service unavailable (with message) in include() (line 19 of /production/home/dipartimento/public_html/sites/all/themes/units_dipartimento_rwd/templates/page.tpl.php).
• Warning: array_multisort(): Array sizes are inconsistent in isi_elenco_persprgr() (line 152 of /production/home/dipartimento/public_html/sites/all/modules/custom/isi_all_persprgr/isi_all_persprgr.module).